ABSTRACT
The various material processing techniques presently in use can
be broadly classified into two categories according to the energy
used in the technique, which are physical processing and chemical
processing. Natural science system is generally classified into three
categories — physical, chemical, and biological. However, no bio-
logical technique has ever been developed for material processing.
The recent advances in biotechnology have led to the widespread
application of its techniques in many fields. Thus, it appears desir-
able to investigate the possibility of biological material processing
techniques. Many kinds of microorganisms exit, some of whose ac-
tions can be considered as a kind of material processing. If it is pos-
sible formicroorganisms tomachine the desired part to the required
depth, they can be useful as tools for micromachining. From the
